Gas jet



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GAS JET Filed Nov, 12, 1920 H151 IIN Y f A l v\\ YP m,

` QTTORNEY.

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Patented June 5, i923.,

narran areas 'LEE F. CHANEY, OF SPRINGFIELD, OHIO, .ASSIGNOR TO THE CHANEY MANUFACTURING PATENT COMPANY, OF SPRINGFIELD, OI-IIO, A. CORPORATION OF OHIO.

GAS J' ET.

Application IedNovember 12, 192i). Serial No. 423,657'.

To all whom t 'may icoacem:

Be it known that I, Len F. CHANEY, a citizen of the United States, residing at Springfield, in the county of Clarke and State of Ohio, have invented certain new and useful Improvements in'G-as Jets, of which the following is a specification. y

This invention relates to' a blast burner or blow torch for operating within hollow or tubular bodies, and more particularly for use in the manufacture of floating or dairy thermometers, while fusing, sealing or otherwise operating upon the thermometer tube or stem, while inclosed within a casing tube of larger diameter.

The object of the invention is to simplify the structure as well asthe means and mode of operation of blast burners for such purposes, whereby they will not only be cheapened in construction, but will be more efflcient in operation, uniform in action, auto-Y matic and unlikely to get out of repair.

ln the manufacture of fioatingor dairy thermometers it is the practice to fixedly attach or unite a thermometer tube within the enlargedfloat tube or casing, prior to filling and Calibrating the tube and bulb. This capillary tube is then sealed within the casing tube before the casing or fioat tube is closed at its outer end. To assist s-uch sealing the end of the capillary tube is fused within the tube or casing 2, and then drawn out or turned to close the capillary bore by touching a rod of glass or a bait to the end of the. capillary tube while plastic. Tnasmuch as the capillary tube is of somewhat less length than the casing or float tube,

and terminates at a point inwardly spaced from the end of the outer tube, in effecting such sealing operation it is necessary to direct the blast or flame within the outer or casing tube, against theend of the capillary tube therein. Much diiiiculty hats been heretofore experienced thru the breakage ofthe casing or float tube during this operation. thru the uneven orl ununiform heating of the outer tubecausing the same to be cracked or shattered due to uneven expansion and contraction.

The present invention is designed to overcome this diioulty by providing for a cirnl culation of air within the casing or float tube during the operation of fusing the capillary tube therein and for the exhaustion of the heat generated and the products of combustion thereby protecting the casing or iioat tube againsty breakage.

W'ith the above primary and other incidental objects in view as will more fully appear .in the specification the invention consists k'of the features of construction', the parts and combinations and combinations thereof and the mode of operation or their equivalents as hereinafter described and set forth in the claims.

Referring to the drawing, Fig. l is a side elevation partly in section of a blast fur@ nace to which the present invention has been applied. Fig. 2 is a top plan view of a portion of the burner showing the relation of the blast jet and exhaust conduit with the burner head and tube support. Fig. 3 is a detail sectional view of the pressure 0perated ejector by which the heated air and products of combustion as exhausted from the casing or float tube. Fig. 4 is a detail perspective view ofthe end of the 'exhaust tube showing the work locating head carried thereby. y Like parts are indicated by similar characters of reference throughout the several ings, l is the fuel supply conduit, thru which gas or other vaporous orhydro-carbon fuel is supplied to a burner head 2. This burner head 2 has been shown merely as an upturned or vertically disposed sleeve, having therein a loose packing 3, of steel wool or other fibrous heat resistant material. The supply of fuel to the burner head 3 is controlled cutofl. valve 4;, interpased in the conduit 1 beneath the burner.` Located inprozrimity to the burner 2 is a supply conduit 5 for fluid under pressure preferably air. rllhis conduit is upturned at 6, and ter- 11v is connected.

minates, in a tapered liet nozzl'e7, in close proximity to and just above one sideot the` burner head 2, across which the ljet nozzle discharges avjet of air or other fluid under pressure.

`rested 1laterally from the burner head.. A

controlvvalvef is provided by which the. 'air blast may be regulated. Leading Jfrom vthe air supply conduit 5, at a point in proximity to the jet conduit 6 is discharge conduit .9, controlled by a cut-off valve 10, a portion of the supply of Afluid, vunder pressurevr is discharged to atmosphere at a peint removed from -the burner.; Communieatingl With this discharge conduit Yr9 is' an' exhaust,4 conduit 1,1, which iscurved laterally, and err-tended substantially in line With the jet of dame directed by the air from the nozzle 7'. The connection of the exhaust conduit 11I Withv the dischargeA conduit-9 is thru ari-injector connection slioivnin detail in Fig. This` comprises a T-'shaped fitting 12 with lthe, lateral arm of which the erhaust conduit rlheinitial section of the discharge conduit 9 projects Withinthe transverse arm of the 'T connection 12 yto. a point beyondthe lateral branch and terminates in a tapered jet nozzle 13, which f discharges thru the connection 12, and into vthe outlet portion 14. of the conduit 9. The discharge et the ]et o1 air under pressure 'thru tie jet nozzle. 13 ,Within the T iittingl ,A 12, creates a. suction thru the lateral branch atmosphere, thru charge conduit. f

of the iittingfand exhaust conduit 11, Where by there "is induced a current of. thru the exhaust conduit from the terminal. thereet toivardVl the fitting 12, vthence outward thru the section la of the` discharge conduit. rlhis induced suction current draws the heated air and products of combustion out ofthe.

r casing or doat tube of the thermometer dur-` ing lthe oper-ation, andv discharges them to the portion 11i of the dis- ,..Tls v@Alieutt @enduit li is Provided its.; intake terminal with a locating and sup- Thev. particular relation of theI jet and burner may be modified to meetr vari infr conditions. W'hile the relationshi .i

porting head 15 tor the Work. This sup porting head comprises a split sleeve, ec

centri'cally secured upon the end of the ei;-

vhaust conduit, With the split or slot 16 1 thereof, substantiallyT alined withl the fet discharged troni the jet nozzle 7.

Theivorh comprisingr the casing or float tube et the dairy thei'mometerl "`with the capillary. tube fxedly mounted therein, is positioned around the locatingI and supporting;f head 15, with the end of the capilla y tube located Within the slot 16 of such head.

'This brings the Aextremity of the capillary tube into positionA to be acted uponjh-v the flame orfblast `from the burner.V These tubesv being of considerable length, it is obvious that the heating of thetubes -will be concentrated or localized at their eXtreini quent unequal expansion and contraction, has lheretotor'e resulted in excessive llosses vfrom breakage, and has materially increased ities, 'lh'is ununitorm heating and lconsethe .cost of, manufacture of such theri'noinc eters. v.In the `present instance, however, so vlong,` as the vblast isbeingdirectedv upon the end of the capillary tube, in the casing or '.tloat'v tube the same supply of air or fluid under pressure by Which the blast effect is `achieved operates thru the ejectorv construction Within theI iitting 12 to induce suctiondraft' thriifthefexhaust,conduit 11, thereby drawing cool au' into the mouth otthe cas ing` or vfloat tube and causingn circulation about 'the point'ot operation, Whichv serves to cool the tube and prevent overheating, and 'the saine time this exhaust or suction draft, eidinusts the'tube of heated ,air and.

products of combustion. rllhe result is that the heating eiiiect oi? the blast or )et flame is confined to the end off theicapillary tube bei*l fuscd, andfeixtreme changes of tein-v ,v nature oi" the adjacent partsro'l tbe work isk avoided, thereby equalizing `the lstrainii'i-`- cidei'it"toy expansion and contraction. kuse oitthis autoi'natic exhaust means incon junctioifi vvii'lrthe burner, has eii'ected a materia] saving-1n inateriai and ivorlr, and cnabled'thermometers oi thisV character to be coinii'ieicially produced inquantities with great tion. Y fWhile the h scribedfasslot leeuw1 located with tionis not at alles i head 15 may 'he a ,continuous annular'collar,

nd', the capillary tube as devoid ot 'any slot 'andfthe capillary i tube may extend Wholly ivitliin this support: 'By

The u and uniform produc` i the slot, ,such constri'icfE sential. rlhe supporting 5 has been shovn'and dep-.V`

splittingthe supporting head, it may be ere panded or contracted radially toagreewith casingv tubes ot diiiierent diameters.; From the above description it Willbe' apparent that there is thus provided a device off the character l described possessing n the particular features et. advantage bei-ore enuf merated as desirable, but which obviously is susceptible of modification in its form, proportions, detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific details shown, but that the means and construction herein disclosed comprise but one of several modes of putting the invention into effect, and the invention is therefore claimed in any of its forms, or modifications within the legitimate and valid scope of the appended claims.

Having thus described my invention, ll claim:

l. .ln a device of the character described, a burner, an air jet directing the flame from such burner within a hollow article operated upon, and a suction conduit extending within the hollow article and exhausting therefrom the heated air and products of combustion.

2. In a construction of the character described, a jet burner and means for local.- izing the effect of the jet burner by establishing an air cooled Zone in proximity to the point of operation of` the jet burner including an exhaust conduit for` simultaneous operation with the burner extending to Y a point in proximity to thepoint of operation of the jet burner for withdrawing heated products of combustion and inducing the flow of a current of air about the point of operation.

8. The combination with a burner, of a jet nozzle for air under pressure in proximity thereto for directing the flame from said burner within a tubular body operated upon, and an exhaust conduit extending within the tubular body in proximity to the jet of flame for withdrawing the heated air and gases.

4.. rllhe combination with a burner of a supply conduit for air under pressure, a branch conduit leading therefrom discharging across the burner to afford a -iet flame, a second branch conduit discharging to atmosphere, exhaust conduit extending into proximity with the point of operation of the jet flame and communicating with the last mentioned branch conduit, an injector'fitting at the intersection of said exhaust conduit and the branch conduit whereby the discharge of air to atmosphere thru the branch conduit will induce a suction thru the exhaust conduit to withdraw heated air and gases from the point of operation.

5. A burner, an exhaust conduit extending in proximity thereto, and a sleeve like support carried by the exhaust conduit about which a tubular body to be operated upon is positioned, the yflame from said burner being directed within such tubular member substantially parallelwith the exhaust conduit. 6. "ln a device for heat treating. thermometers of the floating or insulated type, comprising a burner, an exhaust conduit extending in proximity to the burner and projecting within the casing tube of the thermometer, a split sleeve eccentrically mounted upon the exhaust conduit to be enclosed Within the casing tube for positioning the tube in relation with the burner, the split in said sleeve beingl adapted to receive the capillary tube within the casing to insure proper positioning of the respective tubes in `relation with the burner.

7. ln a device for heat treating thermometers of the floating 'or insulated type, a burner, a tube supporting member adjacent to the burner, a cylindrical head carried by the supporting member, and insertable within the casing tube of the thermometer operated upon, said head having a longitudinal recess in one side thereof to receive the capillary tube within the casing tube to insure proper positioning of the tubes in relation with the burner.

8. In a device for heat treating thermometer tubes of the floating or insulated type, a supporting member having a head insertablue within the casing tube, said head having therein an opening to receive the capillary tube anda burner in proximity to the tubes when engaged upon said head.

9. The herein described process ofsealing the capillary tubes of floating or insulated thermometers consisting in directing a jet of flame upon the end of the capillary tube within ythe casing tube of such thermometer and simultaneously exhausting the air and heated gases from such casing tube.

l0. rlhe herein described process of heat treating glass tubes or other hollow bodies consisting in directing a flame within the tube and simultaneously edecting a circulation of air within the tube.

ll. rChe herein described process of heat treating glass tubes or other hollow bodies consisting of directing a flame within the hollow body and simultaneously drawing thereinto a supply of air.

' 12.v In an apparatus of the character described, a blast burner, a conduit for supplying air under pressure to said blast burner, and a branch conduit extending from the air supply conduit to a point in proximity to the point of operation of the blast burner for inducing a circulation of air about the point of operation of the burner and dissipation of the products of combustion, whereby the effect of the blast burner will be localized.

13. ln an apparatus of the character described, the combination with a jet burner of 'e 'Ventile-ting eondut extending li`11t0,1`1f1y hand thi pl/'O'Xint'y to the point of operation of the v 1920. jetburnerend Ineens for inducing a HOW of Y air through" said-Conduit whereby the heated products of combustion will he dissipated n and theefec-t fof the jetvburnerlocalized.

'y testimony whereof, I have hereunto set e l LEE RCHANEY.

Witnesses? W. F; 4I-IEROLD, JOHN B. MCGREW'.

s `5.th day of. November, A. D. 

